DuPont to Discuss How Integrated Basic Engineering Improves the Efficiency and Quality of Capital Projects

Aspen Technology Announces Financial Results for the Third Quarter Fiscal 2011

Delivers New Aspen HYSYS®, Solids Modeling Within Aspen Plus®,New Aspen PIMS™ Platinum and Aspen Collaborative Demand Manager™, and Breakthrough Innovations in Advanced Process Control, Energy and Economic Analysis

Aspen Technology to Present at the KeyBanc Capital Markets 14th Annual Emerging Technology Summit

Building on aspenONE V7 Innovations and Best Practice Input from Users,7.2 Release Makes Process Optimization Faster and Easier

Aspen Technology to Present at the Cowen and Company 42nd Annual Technology, Media & Telecom Conference

AspenTech Customers Adopt aspenONE V7 and Increase Efficiency in Response to Challenging Economy

Aspen Technology Receives Staff Determination from Nasdaq

Aspen Technology Announces Date of Third-Quarter Fiscal 2010 Financial Results Release, Conference Call and Webcast

Aspen Technology Provides Additional Details Relating to Filing of Form 12b-25 for Annual Report